A labyrinth regulating valve

Abstract

The present invention relates to a labyrinth regulating valve, comprising: a valve cover; a valve body provided with an inlet, an outlet, a first flow channel, a second flow channel and a control cavity; a valve stem slidably connected to the valve cover; an upper cover disposed at the upper end of the valve cover and threadedly connected to the valve stem; a valve core disposed in the control cavity, and rotating the valve stem can control the lifting of the valve core so as to control the on-off of the valve seat; a core package disposed in the control cavity and having a labyrinth flow channel formed therein; a control mechanism disposed in the valve cover, and the lifting of the valve stem can trigger the control mechanism to work, thereby changing the oil circuit so that the core package gradually shrinks layer by layer into the valve cover. The advantages of the present invention are as follows: a multi-layer cylindrical labyrinth core package is provided. When the control opening of the regulating valve gradually increases and the medium flow rate passing through the regulating valve gradually rises, the single-layer cylindrical labyrinth core package slides and shrinks one by one, reducing the obstruction of the labyrinth core package to the medium and avoiding the generation of a large pressure difference.

Description

Technical Field

[0001] The present invention relates to the technical field of regulating valves, and particularly to a labyrinth regulating valve. Background Art

[0002] A regulating valve usually realizes its function of switching the water flow by isolating the water inlet and the water outlet with a valve core. When using a regulating valve to adjust the medium pressure and flow rate in a pipeline, due to throttling and pressure reduction, the pressure difference before and after the regulating valve is too large, and then the medium will flash and cavitate, which will cause serious damage to the surface of parts and generate relatively large noise. When using a labyrinth regulating valve, by using the multi-stage pressure reduction principle of the labyrinth core package, and forcing the medium to flow through a series of right-angled bends, the flow rate of the medium is controlled to achieve the purpose of gradually reducing the pressure, so that the pressure of the medium is always maintained above the vaporization pressure of the medium, thereby avoiding the cavitation phenomenon. However, when the labyrinth regulating valve needs to pass through a large flow rate during use, the labyrinth core package will have an unnecessary obstructive effect on the medium, resulting in a large pressure difference when the medium flows through the labyrinth regulating valve, and generating high temperature during long-term operation, which affects the service life of the labyrinth regulating valve. Summary of the Invention

[0003] Based on this, it is necessary to provide a labyrinth regulating valve for the above problems.

[0004] The present invention discloses a labyrinth regulating valve, which includes: a valve cover; a valve body, the valve body is fixedly connected to the valve cover, an inlet, an outlet, a first flow channel, a second flow channel and a control cavity are opened in the valve body, a valve seat is arranged in the control cavity, the inlet is connected to the control cavity through the first flow channel, and the outlet is connected to the valve seat through the second flow channel; a valve rod, the valve rod is slidably connected to the valve cover; an upper cover, the upper cover is arranged at the upper end of the valve cover, and the upper cover is threadedly connected to the valve rod; a valve core, the valve core is arranged in the control cavity and one end abuts against the valve seat, the other end of the valve core is fixedly connected to the bottom of the valve rod, rotating the valve rod can control the lifting of the valve core, thereby controlling the on-off of the valve seat; a core package, the core package is arranged in the control cavity, and a labyrinth flow channel is opened inside the core package; a control mechanism, the control mechanism is arranged in the valve cover, the lifting of the valve rod can trigger the control mechanism to work, thereby changing the oil circuit, so that the core package gradually shrinks into the valve cover.

[0005] In one embodiment, the control mechanism includes a rotating sleeve, a rotating disc, a linkage ring, and a sliding pin. A second straight groove is formed in the valve cover. The rotating sleeve is rotatably sleeved outside the valve stem. The rotating disc is fixedly connected to the rotating sleeve. The linkage ring is rotatably arranged on the valve stem. The sliding pin is fixedly connected to the linkage ring. A first straight groove is formed in the rotating sleeve. The sliding pin is slidably arranged in the first straight groove and the second straight groove. When the valve stem rotates and rises, it can drive the linkage ring to rise, thereby driving the sliding pin to rise. When the sliding pin slides in both the first straight groove and the second straight groove at the same time, the rotating sleeve can be kept from rotating, so that the rotating disc does not rotate.

[0006] In one embodiment, a spiral groove is further formed in the rotating sleeve. The lower end of the spiral groove is connected to the upper end of the first straight groove. When the valve stem continues to rotate and rise, it can drive the sliding pin to continue to rise and thus enter the spiral groove. When the sliding pin slides in both the spiral groove and the second straight groove at the same time, it can drive the rotating sleeve to rotate, thereby driving the rotating disc to rotate.

[0007] In one embodiment, the core package includes a fourth core package. A fourth cavity is formed in the valve cover. A fourth piston is provided on the fourth core package. The fourth piston is slidably arranged in the fourth cavity and divides the fourth cavity into a fourth piston upper cavity and a fourth piston lower cavity. A third flow channel is further formed in the valve body. A fourth flow channel is further formed in the valve cover. The fourth flow channel connects the rotating disc and the first flow channel to communicate the rotating disc and the inlet. A fifth groove is formed in the rotating disc. The fourth piston upper cavity is connected to the fifth groove. The fourth flow channel can be connected to the fifth groove, so that the fourth piston upper cavity is connected to the inlet. A fifth flow channel and an eighth flow channel are further formed in the valve cover. The third flow channel connects the second flow channel and one end of the fifth flow channel to communicate the outlet and one end of the fifth flow channel. The other end of the fifth flow channel is connected to the rotating disc. The eighth flow channel connects the fourth piston lower cavity and the rotating sleeve. A tenth flow channel is further formed in the valve cover. The tenth flow channel connects the fifth flow channel and the rotating sleeve. A first groove is further formed in the rotating sleeve. The first groove can connect the eighth flow channel and the tenth flow channel, so that the fourth piston lower cavity is connected to the outlet, so that the pressure in the fourth piston upper cavity is greater than the pressure in the fourth piston lower cavity, and the fourth core package can be located in the control cavity.

[0008] In one embodiment, a ninth flow channel is further formed in the valve cover. The ninth flow channel connects the rotating sleeve and the fourth flow channel. Meanwhile, a second groove is formed in the rotating sleeve, and the second groove can connect the ninth flow channel. When the rotating sleeve rotates to drive the rotating disc to rotate, the eighth flow channel and the first groove are staggered, so that the eighth flow channel and the tenth flow channel are disconnected. At the same time, the second groove connects the eighth flow channel and the ninth flow channel. Meanwhile, the fifth groove is disconnected from the fourth flow channel and communicates with the fifth flow channel, so that the upper chamber of the fourth piston communicates with the outlet, and the lower chamber of the fourth piston communicates with the inlet, thereby pushing the fourth piston to rise and driving the fourth core package to rise into the valve cover.

[0009] In one embodiment, the core package includes a third core package. A third cavity is formed in the valve cover. A third piston is provided on the third core package. The third piston is slidably disposed in the third cavity and divides the third cavity into an upper chamber of the third piston and a lower chamber of the third piston. A fourth groove is formed in the rotating disc. The upper chamber of the third piston is connected to the fourth groove. The fourth flow channel can be connected to the fourth groove, so that the upper chamber of the third piston is connected to the inlet. A seventh flow channel is further formed in the valve cover. The seventh flow channel connects the lower chamber of the third piston and the rotating sleeve. The first groove can connect the seventh flow channel and the tenth flow channel, so that the lower chamber of the third piston is connected to the outlet, so that the pressure in the upper chamber of the third piston is greater than the pressure in the lower chamber of the third piston, so that the third core package can be located in the control cavity. When the fourth core package rises into the valve cover and drives the rotating sleeve to continue rotating to drive the rotating disc to rotate, the seventh flow channel and the first groove are staggered, so that the seventh flow channel and the tenth flow channel are disconnected. At the same time, the second groove connects the seventh flow channel and the ninth flow channel. Meanwhile, the fourth groove can be disconnected from the fourth flow channel and communicate with the fifth flow channel, so that the upper chamber of the third piston communicates with the outlet, and the lower chamber of the third piston communicates with the inlet, thereby pushing the third piston to rise and driving the third core package to also rise into the valve cover.

[0010] In one embodiment, the core package includes a second core package, a second cavity is provided on the valve cover, a second piston is provided on the second core package, the second piston is slidably arranged in the second cavity and divides the second cavity into a second piston upper cavity and a second piston lower cavity, a third groove is provided on the rotating disk, the second piston upper cavity is connected to the third groove, the fourth flow channel can be connected to the third groove, so that the second piston upper cavity is connected to the inlet, and a sixth flow channel is also provided in the valve cover, the sixth flow channel connects the second piston lower cavity and the rotating sleeve, the first groove can connect the sixth flow channel and the tenth flow channel, so that the second piston lower cavity It is connected to the outlet, so that the pressure in the upper chamber of the second piston is greater than the pressure in the lower chamber of the second piston, so that the second core package can be located in the control chamber. When the fourth core package and the third core package have risen to the valve cover, the rotating sleeve is driven to continue to rotate to drive the rotating disk to rotate, so that the sixth flow channel and the first groove can be staggered, so that the sixth flow channel and the tenth flow channel are disconnected, and the second groove connects the sixth flow channel and the ninth flow channel. At the same time, the third groove can be disconnected from the fourth flow channel and connected to the fifth flow channel, so that the upper chamber of the second piston is connected to the outlet, and the lower chamber of the second piston is connected to the inlet, thereby pushing the second piston to rise, driving the second core package to rise to the valve cover.

[0011] In one of the embodiments, the core package further includes a first core package, and the first core package is fixedly disposed in the control cavity.

[0012] The advantages of the present invention are:

[0013] 1. A multi-layer cylindrical labyrinth core package is set. When the control opening of the regulating valve is gradually increased and the medium flow rate through the regulating valve is gradually increased, the single-layer cylindrical labyrinth core packages are slid and contracted one by one, so that as the flow rate increases, the number of working labyrinth core packages is reduced, thereby reducing the obstruction of the labyrinth core package to the medium and avoiding excessive pressure difference between the inlet and outlet of the control valve;

[0014] 2. When the valve stem controls the valve core to rise, it can drive the rotating sleeve to rotate, thereby changing the oil circuit and controlling the fourth core package, the third core package, and the second core package to shrink layer by layer. As the medium flow increases, the number of core packages passing through gradually decreases, so that the pressure difference generated by the flow through the regulating valve will not change greatly, and the medium pressure at the outlet is maintained stable;

[0015] 3. A piston is arranged on the single-layer cylindrical labyrinth core package, so that by changing the oil circuit, the medium can push the piston to control the fourth core package, the third core package, and the second core package to shrink and extend layer by layer, thereby completing the control of the core package. The operation is simple and no external control mechanism is required for separate control. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Cross-sectional view of the present invention;

[0017] Figure 2 For the present invention Figure 1 Cross-sectional view in the A-A direction in the present invention;

[0018] Figure 3 For the present invention Figure 1 Cross-sectional view in the B-B direction in the present invention;

[0019] Figure 4 For the present invention Figure 1 Cross-sectional view in the C-C direction in the present invention;

[0020] Figure 5 For the present invention Figure 1 Cross-sectional view in the D-D direction in the present invention;

[0021] Figure 6 For the present invention Figure 1 Cross-sectional view in the E-E direction in the present invention.

[0022] In the figure, valve body 11, first flow channel 111, control cavity 112, valve seat 4, second flow channel 113, third flow channel 114, inlet 115, outlet 116, valve cover 12, second straight groove 126, fourth flow channel 121, ninth flow channel 127, fifth flow channel 122, tenth flow channel 128, sixth flow channel 123, seventh flow channel 124, eighth flow channel 125, valve stem 22, valve core 21, upper cover 3, first core package 51, second core package 52, second piston 521, upper cavity of second piston 5211, lower cavity of second piston 5212, third core package 53, third piston 531, upper cavity of third piston 5311, lower cavity of third piston 5312, fourth core package 54, fourth piston 541, upper cavity of fourth piston 5411, lower cavity of fourth piston 5412, linkage ring 62, sliding pin 61, rotating sleeve 71, first straight groove 711, spiral groove 712, first groove 713, second groove 714, rotating disk 72, third groove 721, fourth groove 722, fifth groove 723. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] It should be noted that when a component is referred to as "mounted on" another component, it can be directly on the other component or there can be an intermediate component. When a component is considered to be "arranged on" another component, it can be directly arranged on the other component or there may be an intermediate component at the same time. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there may be an intermediate component at the same time.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0026] As Figures 1 to 6 shown, the present invention discloses a labyrinth regulating valve, which includes: a valve cover 12; a valve body 11, the valve body 11 is fixedly connected to the valve cover 12, an inlet 115, an outlet 116, a first flow channel 111, a second flow channel 113 and a control cavity 112 are formed in the valve body 11, a valve seat 4 is arranged in the control cavity 112, the inlet 115 is connected to the control cavity 112 through the first flow channel 111, and the outlet 116 is connected to the valve seat 4 through the second flow channel 113; a valve rod 22, the valve rod 22 is slidably connected to the valve cover 12; an upper cover 3, the upper cover 3 is arranged at the upper end of the valve cover 12, and the upper cover 3 is threadedly connected to the valve rod 22; a valve core 21, the valve core 21 is arranged in the control cavity 112 and one end abuts against the valve seat 4, the other end of the valve core 21 is fixedly connected to the bottom of the valve rod 22, rotating the valve rod 22 can control the lifting of the valve core 21, thereby controlling the on-off of the valve seat 4; a core package, the core package is arranged in the control cavity 112, and a labyrinth flow channel is formed inside the core package; a control mechanism, the control mechanism is arranged in the valve cover 12, the lifting of the valve rod 22 can trigger the control mechanism to work, thereby changing the oil circuit, so that the core package gradually shrinks into the valve cover 12.

[0027] It can be understood that the labyrinth flow channel refers to a series of right-angled bends that force the medium to flow through these bends, so that the flow rate of the medium is controlled. When multiple layers of core packages are provided and a large flow rate needs to be passed through, by reducing the number of core package layers, the obstructive effect of the labyrinth core package on the medium can be reduced, and excessive pressure difference can be avoided.

[0028] Preferably, the control mechanism includes a rotating sleeve 71, a rotating disc 72, a linkage ring 62, and a sliding pin 61. A second straight groove 126 is formed in the valve cover 12. The rotating sleeve 71 is sleeved outside the valve stem 22. The rotating disc 72 is fixedly connected to the rotating sleeve 71. The linkage ring 62 is rotatably arranged on the valve stem 22. The sliding pin 61 is fixedly connected to the linkage ring 62. A first straight groove 711 is formed in the rotating sleeve 71. The sliding pin 61 is slidably arranged in the first straight groove 711 and the second straight groove 126. When the valve stem 22 rotates and rises, it can drive the linkage ring 62 to rise, thereby driving the sliding pin 61 to rise. When the sliding pin 61 slides in both the first straight groove 711 and the second straight groove 126, it can keep the rotating sleeve 71 from rotating, so that the rotating disc 72 does not rotate.

[0029] Preferably, a spiral groove 712 is further formed in the rotating sleeve 71. The lower end of the spiral groove 712 is connected to the upper end of the first straight groove 711. When the valve stem 22 continues to rotate and rise, it can drive the sliding pin 61 to continue to rise and thus enter the spiral groove 712. When the sliding pin 61 slides in both the spiral groove 712 and the second straight groove 126, it can drive the rotating sleeve 71 to rotate, thereby driving the rotating disc 72 to rotate.

[0030] It can be understood that when the flow rate of the regulating valve is relatively large, as the control valve opening gradually increases, it can drive the valve stem 22 to rise, and further cause the rotating sleeve 71 to rotate.

[0031] Preferably, the core package includes a fourth core package 54, a fourth cavity is provided on the valve cover 12, a fourth piston 541 is provided on the fourth core package 54, the fourth piston 541 is slidably arranged in the fourth cavity and divides the fourth cavity into a fourth piston upper cavity 5411 and a fourth piston lower cavity 5412, a third flow channel 114 is also provided in the valve body 11, a fourth flow channel 121 is also provided in the valve cover 12, the fourth flow channel 121 connects the rotating disk 72 and the first flow channel 111 so as to connect the rotating disk 72 and the inlet 115, a fifth groove 723 is provided on the rotating disk 72, the fourth piston upper cavity 5411 is connected to the fifth groove 723, the fourth flow channel 121 can be connected to the fifth groove 723, so that the fourth piston upper cavity 5411 is connected to the inlet 115, the valve cover 12 also has a fifth flow channel 122, The eighth flow channel 125, the third flow channel 114 connects the second flow channel 113 and one end of the fifth flow channel 122 to connect the outlet 116 and one end of the fifth flow channel 122, the other end of the fifth flow channel 122 is connected to the rotating disk 72, the eighth flow channel 125 connects the fourth piston lower chamber 5412 and the rotating sleeve 71, the valve cover 12 is also provided with a tenth flow channel 128, the tenth flow channel 128 connects the fifth flow channel 122 and the rotating sleeve 71, the rotating sleeve 71 is also provided with a first groove 713, the first groove 713 can connect the eighth flow channel 125 and the tenth flow channel 128, so that the fourth piston lower chamber 5412 is connected to the outlet 116, so that the pressure of the fourth piston upper chamber 5411 is greater than the pressure of the fourth piston lower chamber 5412, so that the fourth core package 54 can be located in the control chamber 112.

[0032] Preferably, a ninth flow channel 127 is further provided on the valve cover 12, and the ninth flow channel 127 connects the rotating sleeve 71 and the fourth flow channel 121. At the same time, a second groove 714 is further provided on the rotating sleeve 71, and the second groove 714 can be connected to the ninth flow channel 127. When the rotating sleeve 71 rotates and drives the rotating disk 72 to rotate, the eighth flow channel 125 and the first groove 713 can be staggered, so that the eighth flow channel 125 and the tenth flow channel 128 are disconnected. At the same time, the second groove 714 connects the eighth flow channel 125 and the ninth flow channel 127, and at the same time, the fifth groove 723 is disconnected from the fourth flow channel 121 and connected to the fifth flow channel 122, so that the fourth piston upper chamber 5411 is connected to the outlet 116, and the fourth piston lower chamber 5412 is connected to the inlet 115, thereby pushing the fourth piston 541 to rise, driving the fourth core package 54 to rise into the valve cover 12.

[0033] Preferably, the core package includes a third core package 53, a third cavity is provided on the valve cover 12, a third piston 531 is provided on the third core package 53, the third piston 531 is slidably arranged in the third cavity and divides the third cavity into a third piston upper cavity 5311 and a third piston lower cavity 5312, a fourth groove 722 is provided on the rotating disk 72, the third piston upper cavity 5311 is connected to the fourth groove 722, the fourth flow channel 121 can be connected to the fourth groove 722, so that the third piston upper cavity 5311 is connected to the inlet 115, and a seventh flow channel 124 is further provided in the valve cover 12, the seventh flow channel 124 connects the third piston lower cavity 5312 and the rotating sleeve 71, the first groove 713 can connect the seventh flow channel 124 and the tenth flow channel 128, so that the third piston lower cavity 5312 and The outlet 116 is connected, so that the pressure of the third piston upper chamber 5311 is greater than the pressure of the third piston lower chamber 5312, so that the third core package 53 can be located in the control chamber 112. When the fourth core package 54 rises to the valve cover 12, the rotating sleeve 71 is driven to continue to rotate so as to drive the rotating disk 72 to rotate, so that the seventh flow channel 124 and the first groove 713 are staggered, so that the seventh flow channel 124 and the tenth flow channel 128 are disconnected, and the second groove 714 connects the seventh flow channel 124 and the ninth flow channel 127. At the same time, the fourth groove 722 can be disconnected from the fourth flow channel 121 and connected to the fifth flow channel 122, so that the third piston upper chamber 5311 is connected to the outlet 116, and the third piston lower chamber 5312 is connected to the inlet 115, thereby pushing the third piston 531 to rise, driving the third core package 53 to also rise to the valve cover 12.

[0034] Preferably, the core package includes a second core package 52, a second cavity is provided on the valve cover 12, a second piston 521 is provided on the second core package 52, the second piston 521 is slidably arranged in the second cavity and divides the second cavity into a second piston upper cavity 5211 and a second piston lower cavity 5212, a third groove 721 is provided on the rotating disk 72, the second piston upper cavity 5211 is connected to the third groove 721, the fourth flow channel 121 can be connected to the third groove 721, so that the second piston upper cavity 5211 is connected to the inlet 115, and a sixth flow channel 123 is further provided in the valve cover 12, the sixth flow channel 123 connects the second piston lower cavity 5212 and the rotating sleeve 71, the first groove 713 can connect the sixth flow channel 123 and the tenth flow channel 128, so that the second piston lower cavity 5212 is connected to the outlet 116 is connected, so that the pressure of the second piston upper chamber 5211 is greater than the pressure of the second piston lower chamber 5212, so that the second core package 52 can be located in the control chamber 112. When the fourth core package 54 and the third core package 53 have risen to the valve cover 12, the rotating sleeve 71 is driven to continue to rotate to drive the rotating disk 72 to rotate, so that the sixth flow channel 123 and the first groove 713 are staggered, so that the sixth flow channel 123 and the tenth flow channel 128 are disconnected, and the second groove 714 connects the sixth flow channel 123 and the ninth flow channel 127. At the same time, the third groove 721 can be disconnected from the fourth flow channel 121 and connected to the fifth flow channel 122, so that the second piston upper chamber 5211 is connected to the outlet 116, and the second piston lower chamber 5212 is connected to the inlet 115, thereby pushing the second piston 521 to rise, and driving the second core package 52 to rise to the valve cover 12.

[0035] It can be understood that when the medium flow through the control valve is small, the opening of the control valve is small, the valve stem 22 is at a low position, and the sliding pin 61 slides in the first straight groove 711 and the second straight groove 126 at the same time, so that the rotating sleeve 71 and the rotating disk 72 remain fixed. At this time, the second piston 521, the third piston 531 and the fourth piston 541 are connected to the inlet 115 at the top and the outlet 116 at the bottom, and the pressure above the piston is greater than the pressure below, so that the second core package 52, the third core package 53 and the fourth core package 54 are all in Figure 1 The position shown, at this time the obstruction to the medium is the greatest.

[0036] It is worth mentioning that when the medium flow rate gradually increases, the opening of the control valve also gradually increases, and the position of the valve stem 22 gradually rises, driving the rotating sleeve 71 and the rotating disk 72 to rotate, so that the fourth core package 54, the third core package 53, and the second core package 2 are pushed into the valve cover 12 in sequence as the valve stem 22 rises. As the medium flow rate increases, the obstruction to the medium is gradually reduced to avoid a large pressure difference.

[0037] Preferably, the core package further includes a first core package 51, and the first core package 51 is fixedly arranged in the control cavity 112.

[0038] The working mode of the present invention is as follows: when it is necessary to open the regulating valve to adjust the flow rate, first rotate the valve stem 22. Through the threaded connection between the valve stem 22 and the upper cover 3, the valve core 21 is driven to move upward, and the valve port is opened.

[0039] When the valve stem 22 rises in the first straight groove 711, the linkage ring 62 is driven to rise, and then the sliding pin 61 is driven to slide upward in the first straight groove 711 and the second straight groove 126, so that the rotating sleeve 71 does not rotate. At this time, the first groove 713 connects the lower chambers 5212 of the second piston, the lower chambers 5312 of the third piston, the lower chambers 5412 of the fourth piston and the tenth flow channel 128 together, and the third groove 721, the fourth groove 722 and the fifth groove 723 connect the upper chambers 5211 of the second piston, the upper chambers 5311 of the third piston, the upper chambers 5411 of the fourth piston and the fourth flow channel 121 together. Since the tenth flow channel 128 communicates with the outlet 116 through the fifth flow channel 122, and the fourth flow channel 121 communicates with the inlet 115, the pressure above the second piston 521, the third piston 531 and the fourth piston 541 is greater than the pressure below, so that the first core package 51, the second core package 52, the third core package 53 and the fourth core package 54 are maintained at Figure 1 the positions as shown. The medium enters the control cavity 112 through the first flow channel 111 from the inlet 115, and passes through the labyrinth flow channels composed of the fourth core package 54, the third core package 53, the second core package 52 and the first core package 51, so that the flow rate of the medium gradually decreases after passing through multiple right-angle bends, and flows into the second flow channel 113 through a smaller valve port, and is discharged through the outlet 116, so that the flow rate of the medium gradually decreases after passing through multiple right-angle bends, and flows into the second flow channel 113 through a smaller valve port, and is discharged through the outlet 116.

[0040] As Figure 5 and Figure 6As shown, when the sliding pin 61 rises to enter the spiral groove 712, with the rising of the sliding pin 61, it drives the rotating sleeve 71 to rotate clockwise, and at the same time drives the rotating disc 72 to rotate clockwise. When the second groove 714 connects the eighth flow channel 125 and the ninth flow channel 127, the fifth groove 723 disconnects from the fourth flow channel 121 and communicates with the fifth flow channel 122, so that the upper chamber 5411 of the fourth piston is connected to the outlet 116, and the lower chamber 5412 of the fourth piston is connected to the inlet 115. Then it pushes the fourth piston 541 to rise, driving the fourth core package 54 to rise into the valve cover 12, and only the third core package 53, the second core package 52, and the first core package 51 are working; when the second groove 714 connects the seventh flow channel 124, the eighth flow channel 125 and the ninth flow channel 127, the fourth groove 722 and the fifth groove 723 disconnect from the fourth flow channel 121 and communicate with the fifth flow channel 122, so that the upper chamber 5411 of the fourth piston, the upper chamber 5311 of the third piston are connected to the outlet 116, and the lower chamber 5412 of the fourth piston, the lower chamber 5312 of the third piston are connected to the inlet 115. Then it pushes the fourth piston 541 and the third piston 531 to rise, driving the fourth core package 54 and the third core package 53 to rise into the valve cover 12, and only the second core package 52 and the first core package 51 are working; when the second groove 714 connects the sixth flow channel 123, the seventh flow channel 124, the eighth flow channel 125 and the ninth flow channel 127, the third groove 721, the fourth groove 722 and the fifth groove 723 disconnect from the fourth flow channel 121 and communicate with the fifth flow channel 122, so that the upper chamber 5411 of the fourth piston, the upper chamber 5311 of the third piston, the upper chamber 5211 of the second piston are connected to the outlet 116, and the lower chamber 5412 of the fourth piston, the lower chamber 5312 of the third piston, the lower chamber 5212 of the second piston are connected to the inlet 115. Then it pushes the fourth piston 541, the third piston 531 and the second piston 521 to rise, driving the fourth core package 54, the third core package 53 and the second core package 52 to rise into the valve cover 12, and only the first core package 51 is working; thus, as the valve core 21 rises, the valve port increases, the flow rate through the valve increases, and the working core packages gradually decrease, gradually reducing the resistance to the medium flow rate. When the regulating valve has a larger opening, the pressure difference generated by the medium flowing through is relatively stable and there is no large energy loss.

[0041] When the control valve stem 22 descends, it drives the sliding pin 61 to descend, which in turn drives the rotating sleeve 71 to rotate back, and then drives the fourth core package 54, the third core package 53, and the second core package 52 to extend out one by one. As the valve port becomes smaller, the resistance of the labyrinth core package gradually increases, avoiding cavitation and noise.

[0042] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0043] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A labyrinth regulating valve, characterized in that, The described labyrinth regulating valve comprises: A valve cover; A valve body, which is fixedly connected to the valve cover. An inlet, an outlet, a first flow channel, a second flow channel and a control cavity are formed in the valve body. A valve seat is arranged in the control cavity. The inlet is connected to the control cavity through the first flow channel, and the outlet is connected to the valve seat through the second flow channel; A valve stem, which is slidably connected to the valve cover; An upper cover, which is arranged at the upper end of the valve cover and is threadedly connected to the valve stem; A valve core, which is arranged in the control cavity and one end thereof abuts against the valve seat. The other end of the valve core is fixedly connected to the bottom of the valve stem. Rotating the valve stem can control the lifting of the valve core, thereby controlling the on-off of the valve seat; A core package, which is arranged in the control cavity and has a labyrinth flow channel formed inside; A control mechanism, which is arranged in the valve cover. The lifting of the valve stem can trigger the control mechanism to work, thereby changing the oil circuit and causing the core package to gradually contract into the valve cover; The control mechanism includes a rotating sleeve, a rotating disc, a linkage ring and a sliding pin. A second straight groove is formed in the valve cover. The rotating sleeve is sleeved outside the valve stem. The rotating disc is fixedly connected to the rotating sleeve. The linkage ring is rotatably arranged on the valve stem. The sliding pin is fixedly connected to the linkage ring. A first straight groove is formed in the rotating sleeve. The sliding pin is slidably arranged in the first straight groove and the second straight groove. When the valve stem rotates and rises, it can drive the linkage ring to rise, thereby driving the sliding pin to rise. When the sliding pin slides in both the first straight groove and the second straight groove at the same time, it can keep the rotating sleeve from rotating, thereby keeping the rotating disc from rotating; A spiral groove is further formed in the rotating sleeve. The lower end of the spiral groove is connected to the upper end of the first straight groove. When the valve stem continues to rotate and rise, it can drive the sliding pin to continue to rise and thus enter the spiral groove. The sliding pin sliding in both the spiral groove and the second straight groove at the same time can drive the rotating sleeve to rotate, thereby driving the rotating disc to rotate; The core package includes a fourth core package, a fourth cavity is provided on the valve cover, a fourth piston is provided on the fourth core package, the fourth piston is slidably arranged in the fourth cavity and divides the fourth cavity into a fourth piston upper cavity and a fourth piston lower cavity, a third flow channel is also provided in the valve body, a fourth flow channel is also provided in the valve cover, the fourth flow channel connects the rotating disk and the first flow channel so as to connect the rotating disk and the inlet, a fifth groove is provided on the rotating disk, the fourth piston upper cavity is connected to the fifth groove, the fourth flow channel can be connected to the fifth groove, so that the fourth piston upper cavity is connected to the inlet, and a fifth flow channel is also provided in the valve cover , an eighth flow channel, the third flow channel connects the second flow channel and one end of the fifth flow channel so as to connect the outlet and one end of the fifth flow channel, the other end of the fifth flow channel is connected to the rotating disk, the eighth flow channel connects the fourth piston lower chamber and the rotating sleeve, the valve cover is also provided with a tenth flow channel, the tenth flow channel connects the fifth flow channel and the rotating sleeve, the rotating sleeve is also provided with a first groove, the first groove can connect the eighth flow channel and the tenth flow channel, so that the fourth piston lower chamber is connected to the outlet, so that the pressure of the fourth piston upper chamber is greater than the pressure of the fourth piston lower chamber, so that the fourth core package can be located in the control chamber; A ninth flow channel is also provided on the valve cover, and the ninth flow channel connects the rotating sleeve and the fourth flow channel. A second groove is also provided on the rotating sleeve, and the second groove can be connected to the ninth flow channel. When the rotating sleeve rotates and drives the rotating disk to rotate, the eighth flow channel and the first groove can be staggered, so that the eighth flow channel and the tenth flow channel are disconnected. At the same time, the second groove connects the eighth flow channel and the ninth flow channel, and at the same time, the fifth groove is disconnected from the fourth flow channel and connected to the fifth flow channel, so that the upper chamber of the fourth piston is connected to the outlet, and the lower chamber of the fourth piston is connected to the inlet, thereby pushing the fourth piston to rise, and driving the fourth core package to rise into the valve cover.

2. The labyrinth regulating valve according to claim 1, wherein The core package includes a third core package, a third cavity is provided on the valve cover, a third piston is provided on the third core package, the third piston is slidably arranged in the third cavity and divides the third cavity into a third piston upper cavity and a third piston lower cavity, a fourth groove is provided on the rotating disk, the third piston upper cavity is connected to the fourth groove, the fourth flow channel can be connected to the fourth groove, so that the third piston upper cavity is connected to the inlet, a seventh flow channel is also provided in the valve cover, the seventh flow channel connects the third piston lower cavity and the rotating sleeve, the first groove can connect the seventh flow channel and the tenth flow channel, so that the third piston lower cavity is connected to the inlet, The outlet is connected so that the pressure in the upper chamber of the third piston is greater than the pressure in the lower chamber of the third piston, so that the third core package can be located in the control chamber. When the fourth core package rises to the valve cover, the rotating sleeve is driven to continue to rotate so as to drive the rotating disk to rotate, so that the seventh flow channel and the first groove are staggered so that the seventh flow channel and the tenth flow channel are disconnected. At the same time, the second groove connects the seventh flow channel and the ninth flow channel. At the same time, the fourth groove can be disconnected from the fourth flow channel and connected to the fifth flow channel, so that the upper chamber of the third piston is connected to the outlet, and the lower chamber of the third piston is connected to the inlet, thereby pushing the third piston to rise and driving the third core package to rise to the valve cover.

3. The labyrinth control valve according to claim 2, wherein The core package includes a second core package, a second cavity is provided on the valve cover, a second piston is provided on the second core package, the second piston is slidably arranged in the second cavity and divides the second cavity into a second piston upper cavity and a second piston lower cavity, a third groove is provided on the rotating disk, the second piston upper cavity is connected to the third groove, the fourth flow channel can be connected to the third groove, so that the second piston upper cavity is connected to the inlet, a sixth flow channel is also provided in the valve cover, the sixth flow channel connects the second piston lower cavity and the rotating sleeve, the first groove can connect the sixth flow channel and the tenth flow channel, so that the second piston lower cavity is connected to the outlet The valve cover is connected so that the pressure in the upper chamber of the second piston is greater than the pressure in the lower chamber of the second piston, so that the second core package can be located in the control chamber. When the fourth core package and the third core package have risen to the valve cover, the rotating sleeve is driven to continue to rotate to drive the rotating disk to rotate, so that the sixth flow channel and the first groove can be staggered so that the sixth flow channel and the tenth flow channel are disconnected. At the same time, the second groove connects the sixth flow channel and the ninth flow channel. At the same time, the third groove can be disconnected from the fourth flow channel and connected to the fifth flow channel, so that the upper chamber of the second piston is connected to the outlet, and the lower chamber of the second piston is connected to the inlet, thereby pushing the second piston to rise, driving the second core package to rise to the valve cover.

4. The labyrinth control valve according to claim 3, wherein The core package also includes a first core package, and the first core package is fixedly arranged in the control cavity.

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